Teles Vieira Gonçalo, Coarse sand accumulations in granite mountains: the case-studies of the Serra do Geres and Serra da Estrela (Portugal), Zeitschrift fur Geomorphologie. Supplementband Zeitschrift fur Geomorphologie. Supplement;Zeitschrift fur Geomorphologie. Supplementary issue Annals of geomorphology. Supplement;Annales de geomorphologie. Supplement, 119, 1999, pp. 105-118